Keywords: Jewish socialists History 19th century ; Jewish socialists History 20th century ; Immigrants Political activity ; Yiddish language Social aspects ; Jews, East European History ; Working class Jews History ; Labor movement History ; Jewish socialists New York (State) ; New York ; History ; 19th century ; Jewish socialists New York (State) ; New York ; History ; 20th century ; Immigrants New York (State) ; New York ; Political activity ; Yiddish language Social aspects ; New York (State) ; New York ; Jews, East European New York (State) ; New York ; History ; Working class Jews New York (State) ; New York ; History ; Labor movement New York (State) ; New York ; History ; New York (N.Y.) Ethnic relations ; New York (N.Y.) Ethnic relations ; Juden ; New York, NY ; Sozialismus ; Geschichte ; Juden ; New York, NY ; Arbeiterbewegung ; Geschichte ; New York, NY ; Juden ; Einwanderer ; Sozialismus ; Geschichte 1880-1914